<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avater_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" label-width="0px" class="login_form" :rules="loginFormRules">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid" ></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="success" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>        
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    name:'Login',
    data(){
        return {
            //这是表单数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            //这是表单验证对象
            loginFormRules:{
                //验证用户名是否合法
                username:[
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                //验证密码是否合法
                password:[
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '请输入正确的密码，长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods:{
        //点击按钮重置登录表单
        resetLoginForm(){
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            this.$refs.loginFormRef.validate(async valid => {
                if(!valid) return;
                const {data:res} =await this.$http.post('login',this.loginForm);
                    if(res.meta.status !==200){
                        this.$message.error('登录失败');
                    }else{
                        this.$message.success('登录成功');
                    }
                    window.sessionStorage.setItem("token",res.data.token);
                    //通过编程式导航跳转到后台主页
                    this.$router.push('/home');
                    
            })
            
        }
    }
}
</script>

<style scoped>
.login_container {
    height: 100%;
    background-color: rgb(128, 223, 250);
}
.login_box {
    position: absolute;
    width: 550px;
    height: 400px;
    border-radius: 10px;
    background-color: #fff;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avater_box {
    position: absolute;
    box-sizing: border-box;
    width: 130px;
    height: 130px;
    border: 1px solid rgb(255, 211, 211);
    background-color: #fff;
    box-shadow: 0 0 10px #ddd;
    border-radius: 50%;
    padding: 5px;
    left: 50%;
    transform: translate(-50%,-50%);
}
.avater_box img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;

}
.login_form {
    position: absolute;
    bottom: 30px;
    width: 100%;
    padding:0 10px;
    box-sizing: border-box;
}
.btns {
    display: flex;
    justify-content: flex-end;
}
</style>